Knee brake



B. R. SWEET ET AL KNEE BRAK E Filed y 10, 1924 37/ m V17 w E gf- /f 4 w? I 7 a F A 7.]. /7 7 J 6 "70 INVENTORS:

' 7se gzanm swim/m Dalia I I Patented May 26, 1925. r

I UNITED STATES I 1,539,442 PATENT OFFICE.

BEBTBAM 3. SWEET AND HENRY DALTON, OF WHITINSVILLE, MASSACHUSETTS, AS-

SIGNORS TO WHITIN MACHINE WORKS, 013 WHITI'NSVILLE, MASSACHUSETTS, A

CORPORATION OF MASSACHUSETTS.

v KNEE BRAKE.

Application filed May 10, 1924. Serial No. 712,415.

To all whom it may concern:

Be it known that we, BERTRAM R. Swear and HENRY DALTON, citizens of the United States, and residents of Whitinsville, in the county of Worcester and Commonwealth of Massachusetts, have invented certain new and useful Improvements in Knee Brakes, of which the following is a specification, reference being had to the accompanying drawings, forming part thereof.

Our invention relates to knee brakes such as used on spindles for twisting yarn, and its object is to provide a construction which shall be simple and inexpensive to manufacture and at the same time durable and etficient in its operation.

Another object is to provide simple and effective means for oiling the spindle.

In accordance with our invention, the spindle is stopped by simultaneous frictional contact on the upper and lower sides of the bottom flange of the whorl: and in contrast to other knee brakes now in use, in which the braking force is applied through a large leather washer loosely encircling the top of the spindle bolster case and located between the under side of the whorl flange and the top arm of the brake lever, our invention dispenses with this washer, which is expensive to make, and substitutes small pads of leather or other frictional material fixed to the arms of the brake lever, these pads acting directly against the under side of the flange of the whorl.

The invention, in the preferred form of embodiment thereof, is illustrated in the drawings, in which latter,Figure 1 is a partly sectional elevation of a spindle and its accessory parts showing the relation thereto of our braking and oiling means. Figure 2 is a plan View of the same. Figure 3 is a side elevation of the brake lever. Figure 4 is a plan view of brake lever and Figure 5 is a perspective view of the looking member for the combined friction finger and oil inlet cover.

Referring to the drawings, 1 is a spindle having a whorl 2, the spindle being journalled in the usual manner in bolster '3 stationed in bolster case 4, thebase 5 of which is firmly seated in customary manner on the frame 6.

The base 5 is provided with an extension 7 which has the triple function of first providing an oil channel 8 for delivering oil to i the spindle bearings, second furnishing fulprums 9 for the brake lever 10, third servng as a support for the upright post 11 adacent to the whorl, and which has a double function of providing an oil-inlet 12 communicating with the oil channel 8, and of supporting the combined friction finger l3 and oil-inlet cover 14.

The knee brake lever consists of the dcpendmg arm 1O adapted to receive pressure from the knee of the operative, and a yoke or pair of arms 15, 15 projecting therefrom at substantially a right angle and loosely embracing the upper part of the spindle bolster case. The lever is fulcrumed at the intersection 16 of the depending arm and the yoke member on the shoulders 9 of the bolster case extension 7. Lateral displacement of the knee brake is prevented by the sides of the opening 17 through Which loosely extends the post 11. The opening 17 is preferably elongated in the depending arm of the knee brake lever to permit the removal of the lever from its position after the friction finger 13 has been removed and the spindle raised so that the lower whorl flliinge is slightly above the top of the post The centres of the arms 15, 15 are diametrically opposite each other in the ver tical plane of the axis of the spindle. Each arm is provided with a pad 18 of leather which is adapted for frictional contact with the underside of the lower flange of the whorl. It is obvious that when the operator applies pressure with his knee to the depending arm 10 of the knee brake the leather pads 18 will be lifted and in consequence the whorl will rise until the upper side of the lower flange of the whorl comes in contact with the leather pad 19 aflixed to the underside of the friction finger 13. By this construction but little exertion is required on the" part of the operative to stop the rotation of the spindle.

The friction finger 13 is in a swinging relation to the post 11 on the headed stud 20 firmly fixed in the post 11. Preferably the lever is made of a rectangular cross section, one end of the lever servlng as the friction contact holder of the brake mechanism and the other end being of a length sufiicient to act as a cover for the mouth of the oil inlet 7 '12. Normally this lever is locked in its 0 'erative position by the member 21' ivotal y mounted on the oil inlet cover. T is member is preferably made with two side flanges 22 which loosely embrace the sides of post 11 in such a manner as to revent the turning of the lever on its stu Whenever the operative desires to oil thes 'indle he lifts can the locking member 21to t e position 23 shown in dotted lines in Figure land turns the lever on its stud to the position 24 shown in dotted lines in Figure. 2 by so doing the oil hole is uncovered and at the same time diametrically with relation to the axis of the spindle, a post adjacent to the whorl having an oil inlet therein connecting with a channel in the base of the'spindle bolster case,-a lever fulcrumed on a stud fastenedin the top of the post, one arm of said lever provided with a friction pad ada ted to normally engage the. upper sur ace of the diametrically with relation to t e v a channel in the base of the spindle case, a lever fulcrumed on .a stud fixed in whorl flange when the knee brake is operated, the other arm of said lever serving as a cover for the oil inlet, and means for 36 locking said lever in operative position. 2. In a device of the character described, a s indle having a flanged whorl, a knee bra e lever hav ng a pair of arms loosely embracing the spindle bolster case, a. friction pad aflixed to each arm adapted to enage the underside of the bottom flange of t e whorl at points substantlall opposite the spindle, a post adjacent to the whorl aving an oil inlet therein connectin with lster the to of the post, one arm of said lever provi ed with a friction pad adapted tonormally engage the upper surface of the whorl flange when the knee brake is operat ed, the other arm of said lever serving as a cover for'the oil inlet, and a lockin memaxis of I berhinged to the oil inlet cover and aving 65 side flanges loosely embracing the said post and adapted to lock the combined friction finger and oil inlet'cover in operative position. I

specification.

BERT-RAM R. SWEET. HENRY DALTON.

In testimony-whereof, we havesigned this 60 

